CN1075416C - Low melting point and low steam pressure soldering alloyed metal powder for welding stainless steel vessel and its prodn. method - Google Patents
Low melting point and low steam pressure soldering alloyed metal powder for welding stainless steel vessel and its prodn. method Download PDFInfo
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- CN1075416C CN1075416C CN98101071A CN98101071A CN1075416C CN 1075416 C CN1075416 C CN 1075416C CN 98101071 A CN98101071 A CN 98101071A CN 98101071 A CN98101071 A CN 98101071A CN 1075416 C CN1075416 C CN 1075416C
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Abstract
The present invention relates to a tin-base solder alloy powder and a preparation method thereof. The tin-base solder alloy has the constituents of 2.0 to 8.0% of silver, 0.2 to 1.50% of copper, 0.10 to 0.60% of chromium and residual tin. Material is matched according to the constituents of the alloy, and the matched material is melted under inert gas atmosphere and 400 to 500 DEG C, and cast into prealloying ingots. After the prealloying ingots are melted under the inert gas atmosphere and the 400 to 500 DEG C, inert gas is used as atomizing steam for carrying out atomization, and the atomizing pressure is from 1.5 to 3.0MPa. the product of the present invention has the advantages of low oxygen content, good sphericity degree, uniform constituents, minute grain diameter, low melting point and low vapor pressure, and the present invention increases the soldering performance of the solder alloy powder.
Description
The present invention relates to the tin-based solder alloyed powder, the low melting point and low steam pressure soldering alloyed metal powder that is used for welding stainless steel vessel under the vacuum state and preparation method thereof of more specifically saying so.
At present, rustless steel container extensively enters in the daily life field because of characteristics such as it are attractive in appearance, durable, for example thermos-cooker, vacuum cup, kettle etc., for complex-shaped parts of stainless steel, usually adopt soft pricker cream brazing mode to connect, but it is higher that general stainless steel all exists brazing temperature with brazing alloy, the shortcoming that cost is comparatively expensive.For the soldering alloyed metal powder of soldering stainless steel under lower temperature, still untapped come out.
Chinese patent literature CN1046194A has reported the low-melting silver based soldering alloy of a kind of low-vapor pressure, and the composition of this alloy (weight %): Ag 57.0～58.1, and Cu 21.0～22.9, In7.0～18.9, and Sn 3.0～12.0, and Ni 0.1～1.5.The fusing point of this low-vapor pressure, low-melting silver based soldering alloy is 586～636 ℃, and vapour pressure is＜10
-10MmHg can be processed into the sheet material of 0.1mm.It is higher that its advantage is that steam forces down weld strength, and wellability is good, to Ni-based and copper base mother metal wettability is good.But, this silver-base alloy silver that Chinese patent literature CN1046194A reported, the content height of indium, the content of silver is up to 57.0～58.1%, and the content of indium is up to 7.0～18.9%, and the cost of this alloy is increased greatly.
Purpose of the present invention just is to develop a kind of under vacuum state, the novel soldering alloyed metal powder of the low melting point and low steam pressure of welding stainless steel vessel.
Another object of the present invention is to work out the preparation method that a kind of production is applicable to the soldering alloyed metal powder of the low melting point and low steam pressure of welding stainless steel vessel under vacuum state.
The soldering alloyed metal powder of the low melting point and low steam pressure of a kind of Kromarc container of the present invention, percentage meter by weight, its alloying component is a silver 2.0～8.0, copper 0.20～1.50, chromium 0.10～0.60, surplus is a tin.
In the alloying component of the low melting point and low steam pressure soldering alloyed metal powder of Kromarc container, in percentage by weight, its alloying component is a silver 3.10～3.90, copper 0.20～0.80, and chromium 0.10～0.40, surplus tin are good.In alloying component again in percentage by weight, its alloying component silver 3.30～3.6 0, copper 0.20～0.50, chromium 0.10～0.30, surplus tin is for better.
The preparation method of the soldering alloyed metal powder of the low melting point and low steam pressure of a kind of Kromarc container of the present invention; the percetage by weight meter; by alloying component; silver 2.0～8.0; copper 0.20～1.50; chromium 0.10～0.6; surplus is a tin; take by weighing tin; silver; part copper and copper chromium intermediate alloy batching in the 400-500 ℃ of fusing of will preparing burden, are cast into the prealloy ingot under the inert gas atmosphere protection; under the protection of inert gas atmosphere in 400-500 ℃ with after the prealloy ingot fusing; with the inert gas is that atomization gas atomizes, and atomizing pressure is 1.5-3.0MPa, produces the soldering alloyed metal powder of low melting point and low steam pressure.
In preparation during low melting point and low steam pressure soldering alloyed metal powder, by weight percentage, by alloying component, silver 3.10～3.90, copper 0.20～0.80, chromium 0.10～0.40, surplus is a tin, takes by weighing tin, silver, part copper and copper chromium intermediate alloy batching for well; When the preparation low melting point and low steam pressure soldering alloyed metal powder, again by weight percentage, by alloying component, silver 3.30～3.60, copper 0.20～0.50, chromium 0.10～0.30, surplus is a tin, takes by weighing tin, silver, part copper and copper chromium intermediate alloy and prepares burden to better.Above-mentioned said copper chromium intermediate alloy is CuCr
13Intermediate alloy.Under the protection of inert gas atmosphere; in the 400-500 ℃ of fusing or carry out prealloy ingot when fusing of will preparing burden in 400-500 ℃; used inert gas is nitrogen, argon gas a kind of gas wherein, and the pressure of used nitrogen, argon gas a kind of gas wherein is 0.09-0.1Mpa.
Under the protection of inert nitrogen gas or argon gas atmosphere, with intermediate frequency furnace 400-500 ℃ will prepare burden melt 20-40 minute after, be cast into the prealloy ingot for well.The prealloy ingot at first is under the vacuum state of 13.3-1.33pa; charge into inert nitrogen gas, argon gas a kind of gas wherein again; with intermediate frequency furnace in 400-500 ℃; under the protection of inert nitrogen gas, argon gas a kind of gas atmosphere wherein, carry out the fusing of prealloy ingot, the pressure of the inert nitrogen gas that charges into, argon gas a kind of gas wherein be 0.08-0.1Mpa.Adopt the aerosolization powder-making technique, with inert nitrogen gas, argon gas a kind of gas wherein is that atomization gas atomizes, atomizing pressure is 1.5-3.0MPa, make low melting point and low steam pressure soldering alloyed metal powder, its melting range is 220～280 ℃, oxygen analysis is the result show, the total oxygen content≤200ppm of atomized alloy powder of the present invention.
The process chart of its preparation low melting point and low steam pressure soldering alloyed metal powder is seen Fig. 1, and the gas atomization fundamental diagram is seen Fig. 2.At first the prealloy ingot is melted with intermediate frequency furnace 7, the prealloy of fusing is forwarded in the tundish 8, enter inert nitrogen gas, the argon gas a kind of gases at high pressure wherein that pipe 10 enters 1.5-3.0MPa from gases at high pressure, make the soldering alloyed metal powder 11 of the prealloy rapid condensation formation low melting point and low steam pressure of fusing, be collected in the powder catcher 12.
Advantage of the present invention just is:
1. to have oxygen content low for the soldering alloyed metal powder of low melting point and low steam pressure of the present invention, and composition is even, narrow particle size distribution, good sphericity, the characteristic that cost is low.This alloy powder can be mixed with soft pricker cream with suitable scaling powder, make this soft pricker cream be applicable to the stainless steel braze welding technology of (400-500 ℃) under the lower temperature, and make surface smoothing after the soldering, bright and clean, attractive in appearance, keep the original color of stainless steel, brazing filler metal alloy has good wettability to stainless steel brazing filler metal part, have higher welding performance, can satisfy the welding procedure and the performance demands of low temperature, vacuum welding rustless steel container fully.
2. the soldering alloyed metal powder of low melting point and low steam pressure of the present invention has the advantage of low-vapor pressure and low-temperature welding, be convenient in welding process, keep the vacuum of welded part, because each component of brazing filler metal alloy of the present invention is the low volatility metallic element, show its vapour pressure P300 ℃≤10 through 300 ℃ of industrial air-tightness experiments
-8Pa, the brazing temperature of brazing filler metal alloy of the present invention is 400-500 ℃.
3. the preparation method of soldering alloyed metal powder of the present invention has carried out the preparation of prealloy ingot, has improved the uniformity of each alloying element.Adopt the gas atomization fast solidification technology to make the alloy powder composition even, particle diameter is tiny, is microcrystalline structure, has improved the welding performance of brazing alloy.
Fig. 1 produces the process chart at low melting point and low steam pressure soldering alloyed metal powder end
Among the figure, 1 is batching, and 2 is the preparation of prealloy ingot, and 3 for vacuumizing, and charges into the inert gas of protection, and 4 for to melt the prealloy ingot, and 5 are gas atomization, and 6 for making low melting point and low steam pressure soldering alloyed metal powder.
Fig. 2 gas atomization fundamental diagram
Among the figure, 7 is intermediate frequency furnace, and 8 is tundish, and 9 is the working chamber, 10 the pipes that enter for gases at high pressure nitrogen or argon, and 11 is low melting point and low steam pressure soldering alloyed metal powder, 12 is the soldering alloyed metal powder gatherer.
X-ray method (XRD) the facies analysis figure of Fig. 3 embodiment 1 outturn sample
Among the figure, abscissa is the θ angle, and ordinate is CPS.
ESEM (SEM) the pattern photo of Fig. 4 embodiment 1 outturn sample brazing filler metal alloy powder
Below the present invention is further illustrated with embodiment, will help the preparation method and the advantage thereof of product of the present invention and product are done further to understand.Protection scope of the present invention is not subjected to the qualification of these embodiment, and protection scope of the present invention is limited by claims.
Embodiment 1
A kind of low melting point and low steam pressure soldering alloyed metal powder of the present invention, percentage meter by weight, its alloying ingredient composition are silver 3.50, copper 0.30, chromium 0.20, tin 96.0.Taking by weighing purity is silver, part copper, tin and the CuCr of 99.9% (purity is better more than 99.9%)
13The intermediate alloy batching.Under the protection of inert gas argon gas (or nitrogen) atmosphere in 470 ℃ in intermediate frequency furnace, will prepare burden the fusing 30 minutes; the pressure of inert gas is 0.1Mpa; be cast into the prealloy ingot; the prealloy ingot at first is under the vacuum state of 6.67pa; charge into inert gas argon gas (or nitrogen) again; the pressure that charges into the inert gas argon gas is 1.0atm; with intermediate frequency furnace in 470 ℃ of fusings of under the protection of inert gas argon gas atmosphere, carrying out the prealloy ingot; the powder by atomization technology is adopted in prealloy ingot fusing back; with the inert gas argon gas is that atomization gas atomizes; atomizing pressure is 2.0MPa, makes the soldering alloyed metal powder of low melting point and low steam pressure.The brazing filler metal alloy meal component that makes is even, narrow particle size distribution, good sphericity.Its ESEM 8EM shape appearance figure photo is seen Fig. 4.X ray facies analysis figure sees Fig. 3, and most of Sn exists mutually with the four directions in the alloy as seen from Figure 3, and Ag and part Sn form γ-Ag
3Sn, Cu, Cr then are distributed in the matrix with the disperse of alloy element form.The soldering alloyed metal powder of present embodiment can be mixed with soft pricker cream with the scaling powder that suits, squeeze on the stainless steel weldment by certain requirement with distributor, in atmosphere, make thermal source, or under vacuum state, be heated to 430 ± 30 ℃ as thermal source and weld with electric heater with acetylene bluster rifle or heater.Under vacuum state, show its vapour pressure P through 300 ℃ of industrial air-tightness experiments
300 ℃=10
-8Pa, the parts of stainless steel junction surface that atmosphere/vacuum welding obtains is level and smooth, bright and clean, and tensile strength reaches 32MPa, satisfies the instructions for use of low-temperature welding rustless steel container fully.
The low melting point and low steam pressure soldering alloyed metal powder that makes is analyzed, and its alloyed powder composition is Ag3.40%, and Cu 0.30%, and Cr 0.22%, Sn 96.0% (percetage by weight meter).
Embodiment 2
Its equipment and method of operating be substantially with embodiment 1, and only different is, percentage meter by weight, and its alloying ingredient composition is a silver 3.20, and Cu 0.70, and Cr 0.40, and Sn 95.7.
The low melting point and low steam pressure soldering alloyed metal powder of making is analyzed, and its alloyed powder composition is Ag3.40%, and Cu 0.72%, and Cr 0.40%, Sn 95.40% (percetage by weight meter).
Its equipment and method of operating be substantially with embodiment 1, and only different is, percentage meter by weight, and its alloying ingredient composition is a silver 4.9, and Cu 1.10, and Cr 0.5, and Sn 93.5%.
To prepare burden is cast into the prealloy ingot after the fusing immediately, with after the prealloy ingot fusing, is that atomization gas atomizes with the inert nitrogen gas again, produces the soldering alloyed metal powder of low melting point and low steam pressure.
The low melting point and low steam pressure soldering alloyed metal powder of making is analyzed, and its alloyed powder composition is Ag4.88%, and Cu 1.12%, and Cr 0.51%, Sn 93.49% (percetage by weight meter).
Claims (12)
1. the soldering alloyed metal powder of the low melting point and low steam pressure of a Kromarc container is characterized in that, percentage meter by weight, and its alloying component is a silver 2.0～8.0, copper 0.20～1.50, chromium 0.10～0.60, surplus is a tin.
2. according to the soldering alloyed metal powder of the low melting point and low steam pressure of a kind of Kromarc container of claim 1, it is characterized in that, percentage meter by weight, its alloying component is a silver 3.10～3.90, copper 0.20～0.80, chromium 0.10～0.40, surplus is a tin.
3. according to the soldering alloyed metal powder of the low melting point and low steam pressure of a kind of Kromarc container of claim 2, it is characterized in that, percentage meter by weight, its alloying component is a silver 3.30～3.60, copper 0.20～0.50, chromium 0.10～0.30, surplus is a tin.
4. the preparation method of the soldering alloyed metal powder of the low melting point and low steam pressure of a Kromarc container is characterized in that,
1) by alloying component, the percetage by weight meter, silver 2.0～8.0, copper 0.20～1.50, chromium 0.10～0.60, surplus is a tin, takes by weighing tin, silver, part copper and copper chromium intermediate alloy batching,
2) under the protection of inert gas atmosphere in the 400-500 ℃ of fusing of will preparing burden, be cast into the prealloy ingot,
3) under the protection of inert gas atmosphere in 400-500 ℃ with after the prealloy ingot fusing, be that atomization gas atomizes with the inert gas, atomizing pressure is 1.5-3.0MPa, produces the soldering alloyed metal powder of low melting point and low steam pressure.
5. according to the preparation method of the soldering alloyed metal powder of the low melting point and low steam pressure of a kind of Kromarc container of claim 4, the percentage meter is characterized in that by weight, and silver is 3.10～3.90, and copper is 0.20～0.80, chromium 0.10～0.40.
6. according to the preparation method of the soldering alloyed metal powder of the low melting point and low steam pressure of a kind of Kromarc container of claim 5, it is characterized in that, percentage meter by weight, silver is 3.30～3.60, copper is 0.20～0.50, chromium 0.10～0.30.
7. according to the preparation method of the soldering alloyed metal powder of the low melting point and low steam pressure of a kind of Kromarc container of claim 4, it is characterized in that said copper chromium intermediate alloy is CuCr
13Intermediate alloy.
8. according to the preparation method of the soldering alloyed metal powder of the low melting point and low steam pressure of a kind of Kromarc container of claim 4; it is characterized in that; under the protection of inert gas atmosphere; in the 400-500 ℃ of fusing or carry out prealloy ingot when fusing in 400-500 ℃ of will preparing burden, used inert gas is nitrogen, argon gas a kind of gas wherein.
9. the preparation method of the soldering alloyed metal powder of the low melting point and low steam pressure of a kind of Kromarc container according to Claim 8 is characterized in that, the pressure of nitrogen, argon gas a kind of gas wherein is 0.09-0.1Mpa.
10. according to the preparation method of the soldering alloyed metal powder of the low melting point and low steam pressure of a kind of Kromarc container of claim 4, it is characterized in that, under the protection of inert nitrogen gas or argon gas atmosphere, 400-500 ℃ of fusing 20-40 minute of will preparing burden.
11. preparation method according to the soldering alloyed metal powder of the low melting point and low steam pressure of a kind of Kromarc container of claim 4; it is characterized in that; the prealloy ingot is under the vacuum state of 13.3-1.33Pa; charge into inert nitrogen gas, argon gas a kind of gas wherein again; in 400-500 ℃; under the protection of inert nitrogen gas, argon gas a kind of gas atmosphere wherein, carry out the fusing of prealloy ingot, the pressure of the inert nitrogen gas that charges into, argon gas a kind of gas wherein be 0.08-0.1Mpa.
12. the preparation method according to the soldering alloyed metal powder of the low melting point and low steam pressure of a kind of Kromarc container of claim 4 is characterized in that, is that atomization gas atomizes with inert gas nitrogen, argon a kind of gas wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98101071A CN1075416C (en) | 1998-04-01 | 1998-04-01 | Low melting point and low steam pressure soldering alloyed metal powder for welding stainless steel vessel and its prodn. method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98101071A CN1075416C (en) | 1998-04-01 | 1998-04-01 | Low melting point and low steam pressure soldering alloyed metal powder for welding stainless steel vessel and its prodn. method |
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| CN1205260A CN1205260A (en) | 1999-01-20 |
| CN1075416C true CN1075416C (en) | 2001-11-28 |
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| CN98101071A Expired - Lifetime CN1075416C (en) | 1998-04-01 | 1998-04-01 | Low melting point and low steam pressure soldering alloyed metal powder for welding stainless steel vessel and its prodn. method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1895838B (en) * | 2005-07-12 | 2010-09-22 | 北京有色金属研究总院 | Sn-Ag-Cu-Cr-X lead-free soldering material and its preparation |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6660226B1 (en) * | 2000-08-07 | 2003-12-09 | Murata Manufacturing Co., Ltd. | Lead free solder and soldered article |
| CN1895837B (en) * | 2005-07-12 | 2011-04-20 | 北京有色金属研究总院 | Sn-Cu-Cr lead-free soldering material and its preparation |
| CN1325680C (en) * | 2005-08-04 | 2007-07-11 | 上海交通大学 | Sn-Ag-Cu-Cr alloy lead-free solder preparation method |
| CN100370212C (en) * | 2006-04-28 | 2008-02-20 | 沈阳铜兴产业有限公司 | Cu-Sn-Cr-P alloy for ultra-thin water tank belt of automobile |
| CN101362206B (en) * | 2008-10-09 | 2011-03-23 | 陈新国 | Preparation method of continuous high quality soldering powder |
| CN104227008B (en) * | 2014-09-23 | 2016-05-18 | 西安瑞鑫科金属材料有限责任公司 | A kind of preparation method of titanium zirconium German silver solder powder |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4667871A (en) * | 1985-07-24 | 1987-05-26 | Gte Products Corporation | Tin based ductile brazing alloys |
| CN1046194A (en) * | 1989-11-09 | 1990-10-17 | 中国有色金属工业总公司昆明贵金属研究所 | Low-steam pressure, low melting point silver based soldering alloy |
-
1998
- 1998-04-01 CN CN98101071A patent/CN1075416C/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4667871A (en) * | 1985-07-24 | 1987-05-26 | Gte Products Corporation | Tin based ductile brazing alloys |
| CN1046194A (en) * | 1989-11-09 | 1990-10-17 | 中国有色金属工业总公司昆明贵金属研究所 | Low-steam pressure, low melting point silver based soldering alloy |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1895838B (en) * | 2005-07-12 | 2010-09-22 | 北京有色金属研究总院 | Sn-Ag-Cu-Cr-X lead-free soldering material and its preparation |
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| CN1205260A (en) | 1999-01-20 |
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Assignee: Beijing Compo Solder Co., Ltd. Assignor: General Research Institute for Nonferrous Metals Contract fulfillment period: 2008.11.4 to 2022.11.3 contract change Contract record no.: 2008990001437 Denomination of invention: Low melting point and low steam pressure soldering alloyed metal powder for welding stainless steel vessel and its prodn. method Granted publication date: 20011128 License type: Exclusive license Record date: 20081212 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.11.4 TO 2022.11.3; CHANGE OF CONTRACT Name of requester: BEIJING KANGPU XIWEI SOLDER CO., LTD. Effective date: 20081212 |
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